public class Train {
    public static void main(String[] args) {
        int accTime = 0;
        for (int step = 0; step < 240; step++) {
            accTime += 28;
            System.out.println("step: " + step + ", accTime: " + accTime + "/n");
        }
        System.out.println("累计时间：" + accTime / 60 / 24 + "天");
    }
}

